Chapter 38: Thyroid Hormone Replacement

Question 1

thyroid hormone replacement prototype & other meds

Answer 1

Levothyroxine, Liothyronine, Liotrix, Thyroid USP

Question 2

thyroid hormone replacement action/purpose

Answer 2

Replaces T4, T3, or both
↑ metabolism, cardiac output, growth, energy

Question 3

thyroid hormone replacement uses

Answer 3

Hypothyroidism, Myxedema coma
Goiter, cretinism
Post-thyroid surgery or radiation

Question 4

thyroid hormone replacement routes

Answer 4

Oral daily (empty stomach AM)
IV for emergencies

Question 5

thyroid hormone replacement side effects/complications

Answer 5

Overdose → hyperthyroid symptoms (anxiety, tachycardia, weight loss, tremors)
Long-term high dose → atrial fibrillation, osteoporosis

Question 6

thyroid hormone replacement precautions/interactions

Answer 6

Safe in pregnancy
Caution: heart disease, elderly, diabetes
Not for obesity
↓ absorption: iron, calcium, antacids → separate by 4 hrs
↑ warfarin effect → monitor PT/INR
↑ insulin/digoxin needs

Question 7

thyroid hormone replacement nursing/patient tip

Answer 7

Take AM, empty stomach, 30–60 min before food
Do not stop or switch brands
Lifelong therapy
Monitor TSH, T4, HR
Watch for hyperthyroid or hypothyroid signs

Question 8

thyroid hormone replacement effectiveness

Answer 8

TSH/T4 normalize
Energy ↑, weight stabilizes, cold intolerance resolves

Question 9

thyroid hormone replacement NCLEX Tip:

Answer 9

“Levo = Lift metabolism — take early, empty stomach, for life!”